pedal cranks in the way of the motor

R

rijopiatt

New Member
I've got a 1940 Schwinn that I'm mounting a Starfire motor on. Someone told me that the front sprocket is not orignal, so maybe the crank is not either. Anyway, the cranks hit the engine on both sides. What are some solutions to this.

Thanks in advance.

Rick in Indiana
 
Install a wider bottom bracket spindle.....something like this



You may need to get an adapter for that cartridge if your Schwinn has the large bottom bracket shell (which it prolly does), but they're pretty cheap.

dnut
 
I just completed a Felt MP build with a HQ Matic 4 stroke and had pedal clearance issues and had thought about using the wide adapter but opted instead to use shorter cranks
(5 1/2") from 6 1/2" long. I then went to bike store to p/u some 1.25" pedal extenders to get the pedals wider, out from under the motor.
 
Where can I get a 44t chainring that fits that bottom bracket in the post above? I already have some bent crank arms, but the gear that came with the cup and cone BB
is mounted with a pin and bolt. The BB in the pic above uses a keyway.
 
My mates bike had the same problem, the crank arms wouldn't clear the engine by a few mm's, so we jus grinded a small portion of metal off the crank arms.
 
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